Launching-way.



PATENTED AUG. 9, 1904.

J. SALVESEN. LAUNGHING WAY.

APPLIOATIOH rum) D120. 2a, 1903.

H0 IODEL.

INVEII T01? A TTORNEY.

Patented August 9, 1904.

PATENT OFFICE.

JENS SALVESEN, OF CAMDEN, NEW JERSEY.

LAUNCHING-WAY.

SPECIFICATION forming part of Letters Patent N0. 766,974, dated. August9, 1904.

Application filed December 28, 1903- Serial No. 186,265- (No model.)

To r117 whom, it may concern:

Be it known that I, Jens SALvnsEN, a citizen of the United States, and aresident of the city and county of Camden, State of New Jersey, haveinvented certain new and useful Improvements in Launchingays, of whichthe following is a specification.

My invention relates to improvements in launching-ways for vessels; andthe object of my invention is to furnish a means for controlling thefluidity of the lubricant used be- .tween the stationary and slidingparts of the ways, so that it will be in the condition to give the bestresults when the vessel carried by the ways is launched.

The lubricant almost universally used to grease launohingways is tallow.In cold weather this material not infrequently gets so chilled and stifithat its lubricating properties disappear, and in hot weather itsometimes melts and runs away or by the weight of the vessel upon thesliding way it is forced out between the sliding way and the stationaryway to such an extent that the former refuses to slide upon the latter.

The purpose of my invention is to furnish a means whereby the lubricantmay be quickly and economically heated and softened in cold weather orcooled and hardened in warm weather to a proper degree to produce thebest results.

My invention is illustrated in the accompanying drawings. in which--Figure 1 is a side elevation of part of a launching-way; Fig. 2. abottom plan of the upper part of the sliding way; Fig. 3, a plan of partof the shoe of the sliding way; Fig. 4, a section of Fig. 1 on line A A;Figs. 5, 6, and 7, similar views of modifications of my invention; Fig.8, a side elevation of part of a stationary way, showing a modificationof my invention; Fig. 9, a section of Fig. 8 on line B B.

ais part of astationary and Z) part ofa sliding way. The ways areusually constructed of wood and are of a size proportionate to the sizeand weight of the vessel to be launched. Tallow is placed between theways, and sometimes one or both of them are furnished with a shoe 0 ofharder wood than the part to which it is attached-this to save wear.

As I have before stated, the tallow sometimes gets so cold and stiflthat it ceases to be a good lubricant, and at other times it becomes soheated and soft that it is pressed out between the ways.

In order to heat or cool the tallo\v,'I construct the ways as "follows:Upon the under side of the sliding way I) or upon the upper side of thestationary way a I form a number of grooves (Z, or in some cases asingle groove might suflice, and I cover the bottom or the top of theway with a shoe 0, as shown in Figs. 1, 2, and 8. The way is furnishedwith a port a, through which heated air, steam, hot water, or otherheated fluidv in cold weather or cold air, cold water, brine, or othercooling fluid in hot weathercan be admitted to the groove or grooves d.A port f properly located may be employed for drawing oil the spentfluid from the groove or grooves. In cold weather the heated fluidacting through the shoe 0 will heat the lubricant until it is in propercondition, and in hot weather the cooling fluid will prevent unduemelting.

In some cases it would be advantageous to form the grooves in the shoe0, as shown in Fig. 5, instead of in the way Z). In others the groovecould be partly formed in the Way and partly in the shoe, as shown inFig. 7. In other cases it might be found advantageous to close thebottom of the grooves with a metal plate, as shown in Fig. 6, instead ofwith the shoe.

Ido not desire to confine myself to a grooved sliding way, .as the sameresult could be accomplished with a substantially similar arrange mentof grooves in the stationary way, or both ways could carry grooves orequivalent means for conducting the fluid used.

It is essential that the grooves be protected from the tallow by a cupor similar covering 0 passage or passages for thecirculation of aheating or a cooling fluid.

3. In a launching-Way, in combination, a stationary member and a slidingmember one of which is furnished With grooves or passages fora heatingor cooling fluid, and a cap-piece for closing the open sides of saidgrooves or passages.

J EN S SALVESEN.

Witnesses B. TENNESON, W. R. HUMMEL.

